Hi, I tried to determine my axle ratio by putting a mark on bot the driveline and the tire, jacking up the back end and spinning the tire one rotation to count the driveline revolutions.....one turn of the tire got me a little less then 2.25 turns on the driveline......that can't be right can it? It didn't feel like it was slipping or sticking...I'm told it's an Eaton ten bolt axle. That's all I know at this point. Though I DO know the engine is screaming at 20 in second gear. The number cast on the front of the case is 3883379 if that helps any.